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3-1 through 3-3
parallel lines theorems ect.
11
Mathematics
10th Grade
11/06/2008
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Term
3-1: If two parallel planes...
 Definition
...are cut by a third plane, then the lines of intersection are parallel
Term
post. 10: If two parallel lines are cut by a transversal, then corresponding...
 Definition
...angles are congruent
Term
3-2: If 2 parallel lines are cut by a transversal, then alternate...
 Definition
...interior angles are congruent
Term
3-3: If 2 paallel lines are cut by a transversal, the same side...
 Definition
...interior angles are supplementary
Term
3-4: If a transversal is perpendicular...
 Definition
...to one of 2 parallel lines, then it is perpendicular to the other one also.
Term
3-5:If two lines are cut by a transversal and alternate...
 Definition
...interior angles are congruent, then the lines are paralllel.
Term
3-6: If 2 lines are cut by a transversal and same-side...
 Definition
...interior angles are supplementary, then the lines are parallel
Term
3-7: In a plane...
 Definition
...two lines perpendicular to the smae line are parallel
Term
3-8: through a pointe outside a line, ther is exactly one line parallel...
 Definition
...to the given line.
Term
3-9: Through a point outside a line, there is exactly one line perpendicular...
 Definition
...to the given line.
Term
3-10: 2 lines...
 Definition
...parallel to a third line are parallel to eachother
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